if you still haven't found, i've got one for you. it's exactly with that specs you are looking for - 233 mhz ppc and 060@50 mhz. i am not the first owner of this card, but its in a very good condition and everything seems pretty original on it - i dont think there was any overclocking done before. if you are interested, i'll take some photos for you to take a look on it...
If you're interested in this, please start up a new "Wanted" thread, as this avoids possible thread confusion and allows buyers and sellers to leave appropriate feedback.
It is perfectly acceptable if you do start a Wanted, to then point it out to Slay with a link to your thread and if the sale then falls through, you have a shot.